Corner shelf



FIG. 1 is a top, front, right side perspective view of a corner shelf ofthe new design;

FIG. 2 is a front elevation view of thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the figures show portions of the corner shelf whichform no part of the claimed design. Additional broken lines showenvironment and form no part of the claimed design.

CLAIM The ornamental design for a corner shelf, as shown and described.